When that's said, 4K is just too small icons in AoC to be useful. I know ther are a few UI's you can use but none are 100% compatible. I've had a Dell U2715H 2560x1440 for almost two years now and it works brilliant, except some tearing a few times per week.

You'd need a graphics card with displayport connector. HDMI or DVI won't support that refresh rate. Also if you would want to use the G-SYNC feature it is reserved for NVidia cards and pretty powerful ones too. I'd say you need a GTX 980 or GTX 1070 and a CPU to match at least high end Haswell or more powerful to take full use of this monitor.

Personally I feel 1080p offers too little in height for Age of Conan. Chat boxes and the rows on UI eat up all the space. 2560x1440 works great. Bigger monitors like the 32" you suggested, is often intended for other use than gaming. Watch out for refresh rates and response times.

You'd need a graphics card with displayport connector. HDMI or DVI won't support that refresh rate. Also if you would want to use the G-SYNC feature it is reserved for NVidia cards and pretty powerful ones too. I'd say you need a GTX 980 or GTX 1070 and a CPU to match at least high end Haswell or more powerful to take full use of this monitor.

Personally I feel 1080p offers too little in height for Age of Conan. Chat boxes and the rows on UI eat up all the space. 2560x1440 works great. Bigger monitors like the 32" you suggested, is often intended for other use than gaming. Watch out for refresh rates and response times.

A 1060 would do as well, as I run a similar resolution on my pc with no issues.

It depends on the game

AoC in 1440p - I found that anything beyond a gtx 970 or gtx 1060 is a waste because you're severely CPU limited. On the other hand my gtx 670 (equivalent to a gtx 960 these days) was definitely giving me noticeably lower fps with the same CPU. But upgrading to a gtx 980 ti (equivalent to a gtx 1070) gave me 0 extra fps vs the 970 in AoC. But upgrading the RAM and CPU (Sandy Bridge to Haswell with similar clocks) made a huge difference as expected.

For modern games I definitely wouldn't recommend anything less than a gtx 1070 or equivalent for 1440p (and a high clocked Haswell or Skylake/Broadwell CPU).

G-sync is also a big deal in AoC since the framerate is always going to be all over the place and it makes the game feel consistently smooth (well as smooth as AoC can be, better not compare it with other games ).

Off topic: I tried 16:9, 16:10, and 5:4 with the game; and the worst was 16:9. If you go for a monitor, choose the one that does not cut the upper and lower parts like crazy. 1920x1200 should be the minimum, I guess. 2560×1600 would be ideal.

Remove daily rewards and the raid finder;

remove membership bonuses;

disable PVE XP for daily challenges;

remove WBs forever on Crom;

slow down the AA gain;

lower the PVP XP gain or remove the streak system;

remove AoE looting;

add the missing mobs back to Khesh., F. of the Dead, and Eigl. Mount.;